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The two electrons in a helium atom are separated by about 0.10 nm and the separation between either electron and the nucleus is about 0.050 nm. What is the total electric potential energy of the atom? Assume the nucleus is a point charge with q = +2e and for simplicity do not include the potential energy associated with the Coulomb repulsion of the two protons in the nucleus. Compare your answer with the ionization energy of a helium atom and with the energy required to remove both electrons from a helium atom.
a vortex tube is used to separate an ideal gas at 10 bar and 375 k such that half the gas is collected in a cool stream
Compute the percentage ionic character of the interatomic bond for each of the following compounds: MgO, GaP, CsF, CdS, and FeO
a particle travels along the circular path x2 y2 r2. if the y component of the particles velocity is vy 2r cos 2t
Lift coefficient (Cl) and lift (L), An airfoil of surface area 1ft squared is tested for lift (L) in a wind tunnel. At an angle of attack of 5 degrees with standard air of density 0.0024 slugs/ft cube at a speed of 100 ft/sec
a crystalline grain of iron in a steel plate is situated in such a way that a tensile stress of 100 mpa 14.5 ksi is
a bank uses a certain form at a uniform rate of 60 pads per week during each of the 52 weeks per year it is in
for a 6000 square feet combination gym and exercise if is desire to reduce outdoor air intake to a minimum by filtering
use constant specific heats at room temperature. round all answers to one decimal place. a simple brayton cycle
a four foot diameter reel of wire pays out 250 feet of conductor wire in two minutes. what is the average angular
a closed rigid tank contains 5 lbm of a two phase mixture of water initially at 260degf with a quality of 0.6. heat
in a crank or slotted lever quick mechanism the distance between the fixed centre is 150 mm and driving crank is 75 mm. determine the ration of the time taken of cutting & return strake .
an external moment of 500 n-m is applied to the composite plate in clockwise direction as shown. the square plate is
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